William lowe



(No Model.)

W. LOWE.

FURNACE FRONT.

Patented Jan. 13, 1885.

111v erzZ'or N. PETERS. Phnlu'LHhqgmphcr. Washinglolh D.C

Parent @rrrcn.

WILLIAM LOWVE, OFBRIDGEPORT, CONNECTICUT.

FURNACE-FRONT.

SPECIFICATTON forming part of Letters Patent No. 310,835, dated January13, 1885. Application filed June 7,1884. (No mode To all whom it mayconcern.-

Be it known that I, WILLIAM Lowe, a citizen of the United States,residing at Bridge port, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements inFurnace-Fronts; and I do hereby declare the following to be afull,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

The objects of this improvement are, first, a furnace-front forpreventing the warping, cracking, and premature destructioncharacteristic with furnace-fronts of usual construction, and which iscaused by the frequent expansion and contraction of the metal com posingthe same by reason of the part which covers the furnace getting hotterthan those portions which cover the brick-work and the end of theboiler, smoke-stack, or combustion-chamber; and, secondly, to obtain amore effective combustion of fuel, from supplying the usual deficiencyof oxygen by means of air introduced into the furnace over the top ofthe fuel, over the whole width of the furnace, both at its front andrear ends. These results are attained by the mechanism illus trated inthe drawings herewith filed as part hereof, in which the same letters ofreference denote the same parts in the different views.

Figure 1 is a front elevation, partly in sec tion, of a furnaceembodying the features of my improvement. Fig. 2 is a sectional sideelevation. Fig. 3 is a transverse vertical section. Fig. 4. is alongitudinal vertical section on an enlarged scale.

A is a wall forming an inner front for the furnace I, and having asemicircular or con caved top, the curve of which is greater than thediameter of the boiler 13, between which and the wall A there is an airor draft space, as indicated by the arrows numbered 1, and shown inFigs. 1 and 2. This wall A is built upon a transverse plate, d, madeintegral with or suitably secured to the furnace-front F. It also restson and is additionally supported by the front portion, K, of thefurnace-wall K. The plate a has a vertical extension, referred to at a,Fig. 2, having the same profile as the wall A, and is to be set at adistance of several inches from the front F, to form a suitable air-space or vertical drafteoursc adjoining the inside of the boiler-front,as shown at A, Figs. 1 and 2.

D represents the usual bridge-wall of an ordinary furnace.

O is an auxiliary or special bridge-wall, constructed in the same manneras the wall A in the front end of the furnace I, being built on atransverse plate, 0, supported by the furnace-wall K, and additionallysupported bya transverse plate, 0 having vertical flange 0, and bothplates are braced by a central stand-piece, I. The plate 0 has avertical extension, 0, for better preserving the structure 0, and has aprofile corresponding to the semicircular or concaved top of the latter,between which and the boiler there is a suitable air-space ordraft-course, indicated by the arrows numbered 2, and which isapproached through the recess or air-space E between the structure 0 andthe usual bridge-wall, D.

G is a gate arranged to slide between the transverse plates 0 and 0" bymeans of lever 9, supported by a transverse rod or-rockshaft, G, securedby any suitable means to plate 0 R is a rod connecting with the lowerend of the lever g, and extending through the furnace-front,-where it isprovided with an eye or handle, R, for operating the lever g, andthereby partially or entirely opening or closing the draft-course E bymoving the gate G out from or back into the recess 0 between the plates0 0 L is the space between the rear portion of the boiler and the flooror ground L.

S is the earth or filling below the floor.

J represents the usual grate-"bars.

Q is the furnace-door.

Q is the door to the ash-pit H.

F is a draft-door or flue-cap secured to the front F by hinges f, andprovided at its lower part with a handle, f, for operating the same. Thefront F is provided with one or more registers, O, controlling theadmission of air into the furnace. The inner front wall, A, with theintermediate air-space, A, will prevent the uneven heating of thefurnace-front F, and its premature destruction from frequent contractionand expansion, and by reason of the space between the top of the wall Aand the boiler B the air-spaceA is made additionally air into thefurnace useful for introducing 1. The combination, in a boiler-furnace,of a front consisting of a metallic facing, and having arearwardly-extending horizontal ledge,

5 and an inner brick wall built upon said ledge to form an intermediateair-space, substantially as set forth.

2. The combination, in a boiler-furnace, of a front consisting of ametallic facing having a 20 rearwardly-extending horizontal ledge and avertical portion forming an intermediate airspace, and an inner brickWall built upon said ledge to re-enforce said vertical portion,substantially as set forth.

3. The combination, in a boiler-furnace, of 25 an auxiliary bridge-wall,0, consisting of a metal plate provided with a horizontal ledge, and avertical portion and brick wall built upon said ledge, substantially asset forth.

4. The combination, in aboiler-furnace, of a 0 main bridge-wall, anauxiliary bridge-wall arranged to form an intermediate air-space, E, agate, G, and means for operating the same, substantially as set forth.

In testimony whereof I affix my signature 5 in presence of twowitnesses.

WILLIAM LOWE.

Witnesses: I

E. WILMoT, GEO. W. WARNER.

